780974977 has 2 divisors, whose sum is σ = 780974978. Its totient is φ = 780974976.

The previous prime is 780974927. The next prime is 780975001. The reversal of 780974977 is 779479087.

780974977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767899521 + 13075456 = 27711^2 + 3616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780974977 is a prime.

It is not a weakly prime, because it can be changed into another prime (780974927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390487488 + 390487489.

It is an arithmetic number, because the mean of its divisors is an integer number (390487489).

Almost surely, 2^780974977 is an apocalyptic number.

It is an amenable number.

780974977 is a deficient number, since it is larger than the sum of its proper divisors (1).

780974977 is an equidigital number, since it uses as much as digits as its factorization.

780974977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The square root of 780974977 is about 27945.9295247090. The cubic root of 780974977 is about 920.8997880138.

The spelling of 780974977 in words is "seven hundred eighty million, nine hundred seventy-four thousand, nine hundred seventy-seven".